Results 31 to 40 of about 4,611,274 (296)

An Updated Solar Cycle 25 Prediction With AFT: The Modern Minimum [PDF]

open access: yesGeophysical Research Letters, 2018
Over the last decade there has been mounting evidence that the strength of the Sun's polar magnetic fields during a solar cycle minimum is the best predictor of the amplitude of the next solar cycle.
L. Upton, D. Hathaway
semanticscholar   +1 more source

Solar Cycle Dependence of Solar p Modes [PDF]

open access: yesSymposium - International Astronomical Union, 1988
Data obtained at Izana (Tenerife) and Haleakala (Maui), using optical resonant scattering with a potassium vapour cell over the years 1980–84, are used to determine the frequencies of the low ℓ p modes. Possible variation in these frequencies with the solar cycle are investigated.
G.R. Isaak   +7 more
openaire   +1 more source

Prediction of even and odd sunspot cycles

open access: yesJournal of Space Weather and Space Climate, 2023
Here we study the prediction of even and odd numbered sunspot cycles separately, thereby taking into account the Hale cyclicity of solar magnetism. We first show that the temporal evolution and shape of all sunspot cycles are extremely well-described by ...
Asikainen Timo, Mantere Jani
doaj   +1 more source

Seasonal, Diurnal, and Solar-Cycle Variations of Electron Density at Two West Africa Equatorial Ionization Anomaly Stations

open access: yesInternational Journal of Geophysics, 2012
We analyse the variability of foF2 at two West Africa equatorial ionization anomaly stations (Ouagadougou and Dakar) during three solar cycles (from cycle 20 to cycle 22), that is, from 1966 to 1998 for Ouagadougou and from 1971 to 1997 for Dakar.
Frédéric Ouattara   +2 more
doaj   +1 more source

Solar Cycle 25 Prediction Using N-BEATS

open access: yesThe Astrophysical Journal, 2023
Solar activities lead to Sun variation with an 11 yr periodicity. The periodic variation affects space weather and heliophysics research. So it is important to accurately predict solar cycle variations. In this paper, we predicted the ongoing Solar Cycle
Xu Su   +4 more
doaj   +1 more source

Relationship between the low-latitude coronal hole area, solar wind velocity, and geomagnetic activity during solar cycles 23 and 24

open access: yesEarth, Planets and Space, 2019
In order to statistically investigate the relationship between the low-latitude coronal holes (CHs), the solar wind speed, and the geomagnetic activity in solar cycles 23 (1996–2008) and 24 (2009–2016), we conducted a superposed epoch analysis of the ...
Yumi Nakagawa   +2 more
doaj   +1 more source

Parameters estimation and life cycle economic analysis of a PV powered tri-cycle in India [PDF]

open access: yesArchives of Electrical Engineering, 2018
This paper is devoted towards life cycle economic analysis (LCEA) of a solar photovoltaic (PV) powered tri-cycle. The paper is meant to propose a more systematic approach in determining the optimum use of scarce resources in order to determine the most ...
Soumya Das   +4 more
doaj   +1 more source

Solar cycle 24: An unusual polar field reversal [PDF]

open access: yesAstronomy & Astrophysics, 2018
Context. It is well known that the polarity of the Sun’s magnetic field reverses or flips around the maximum of each 11 year solar cycle. This is commonly known as polar field reversal and plays a key role in deciding the polar field strength at the end ...
P. Janardhan   +4 more
semanticscholar   +1 more source

High-Efficiency Power Cycles for Particle-Based Concentrating Solar Power Plants: Thermodynamic Optimization and Critical Comparison

open access: yesEnergies, 2022
This paper investigates and compares several highly efficient thermodynamic cycles that are suitable for coupling with particle-in-tube fluidized-bed solar receiver technology.
Miguel Angel Reyes-Belmonte   +1 more
doaj   +1 more source

Variation of Solar, Interplanetary and Geomagnetic Parameters during Solar Cycles 21-24 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2013
The length of solar cycle 23 has been prolonged up to about 13 years. Many studies have speculated that the solar cycle 23/24 minimum will indicate the onset of a grand minimum of solar activity, such as the Maunder Minimum.
Suyeon Oh, Bogyeong Kim
doaj   +1 more source

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